Martin and Neil comfort a recently dumped Jean, and Martin returns to the flat to share a - platonic - bed with her. Steven gets him a job doing celebrity voices for SatNav and whilst the engineer is out, Martin ad-libs and is caught on the security camera. His impressions end up onlinr and he becomes an anonymous celebrity with a possible television career.

After the flood damage caused by Jean from upstairs leaving the bath taps on, Martin takes his computer for repair and narrowly avoids being arrested when a photo of himself as an infant is found on it. His plans to meet Steven at the zoo are interrupted so Martin does an impression of Sir David Attenborough as he escorts blind Della around and gives commentary on the animals. He moves in with Neil, who arranges a disastrous double date but introducing Steven to his family goes more smoothly.

Against Jean's advice, Martin goes ahead with the wedding, financing it himself since Harriet's father has dropped out. Harriet, apparently more attracted to his impressions than Martin himself, criticises him, and on the way to the honeymoon, Martin makes the definite choice for his future.

Whilst Neil finds working out the perfect therapy, Martin opts to swap mimicry for stand-up but it's a disaster, finally redeemed when he switches back to impressions. To the dismay of the adoring Jean, he proposes to Harriet, largely to give Steven a family, telling her that the ring he found is a family heirloom. She accepts but on the condition he convert to Judaism, which involves him being circumcised!

Following the failed voice over session, Martin is now jobless and doen an agent as Steven, depressed by his mother's death, wants time to himself. Neil, newly dumped by Jean, agrees to be Martin's agent and gets him a spot busking at the mall. However, he pales in comparison to the violinist and the human statue and is nearly arrested for not having a licence. Back home, Martin is visited by the revenue man regarding unpaid tax.

Though his career is flourishing, Martin is perturbed by Harriet's enthusiastic wedding planning and, particularly, the prospect of circumcision. Harriet has Sunday dinner with the Hurdles, where Nan lets slip that the ring was in fact found in a drain. On his stag spa weekend, Martin meets Harriet's laddish, non-kosher brother Glen, who reveals that Harriet was recently dumped by Nigel Lord and that her possessive father is requiring the circumcision to put Martin off the wedding.